Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Tax Contingency [Line Items]
Effective tax rate			40.60%	15.70%	13.50%
Income taxes	$ 4,008	$ 2,342	$ 31,426	$ 9,926
2013 U.S Court Decision [Member]
Income Tax Contingency [Line Items]
Effective tax rate			19.60%
Income taxes			$ 16,389
Aerospace [Member]
Income Tax Contingency [Line Items]
Tax incentives scheduled to expire in 2013	0		0